/*******************************************************************************
 * SAT4J: a SATisfiability library for Java Copyright (C) 2004-2008 Daniel Le Berre
 *
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *
 * Alternatively, the contents of this file may be used under the terms of
 * either the GNU Lesser General Public License Version 2.1 or later (the
 * "LGPL"), in which case the provisions of the LGPL are applicable instead
 * of those above. If you wish to allow use of your version of this file only
 * under the terms of the LGPL, and not to allow others to use your version of
 * this file under the terms of the EPL, indicate your decision by deleting
 * the provisions above and replace them with the notice and other provisions
 * required by the LGPL. If you do not delete the provisions above, a recipient
 * may use your version of this file under the terms of the EPL or the LGPL.
 * 
 * Based on the original MiniSat specification from:
 * 
 * An extensible SAT solver. Niklas Een and Niklas Sorensson. Proceedings of the
 * Sixth International Conference on Theory and Applications of Satisfiability
 * Testing, LNCS 2919, pp 502-518, 2003.
 *
 * See www.minisat.se for the original solver in C++.
 * 
 *******************************************************************************/
package org.sat4j.minisat.constraints;

import org.sat4j.minisat.constraints.AbstractDataStructureFactory;
import org.sat4j.minisat.constraints.cnf.CBClause;
import org.sat4j.minisat.constraints.cnf.Clauses;
import org.sat4j.minisat.constraints.cnf.Lits;
import org.sat4j.minisat.core.Constr;
import org.sat4j.minisat.core.ILits;
import org.sat4j.minisat.core.Propagatable;
import org.sat4j.specs.ContradictionException;
import org.sat4j.specs.IVec;
import org.sat4j.specs.IVecInt;

/**
 * @author parrain To change the template for this generated type comment go to
 *         Window - Preferences - Java - Code Generation - Code and Comments
 */
public class ClausalDataStructureCB extends AbstractDataStructureFactory<ILits> {

	private static final long serialVersionUID = 1L;

	/*
	 * (non-Javadoc)
	 * 
	 * @see
	 * org.sat4j.minisat.core.DataStructureFactory#conflictDetectedInWatchesFor
	 * (int, int)
	 */
	@Override
	public void conflictDetectedInAttachesFor(int p, int i) {
		// to nothing
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see org.sat4j.minisat.core.DataStructureFactory#getWatchesFor(int)
	 */
	@Override
	public IVec<Propagatable> getAttachesFor(int p) {
		return getVocabulary().attaches(p);
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see
	 * org.sat4j.minisat.core.DataStructureFactory#createClause(org.sat4j.specs
	 * .VecInt)
	 */
	public Constr createClause(IVecInt literals) throws ContradictionException {
		IVecInt v = Clauses.sanityCheck(literals, getVocabulary(), solver);
		if (v == null)
			return null;
		return CBClause.brandNewClause(solver, getVocabulary(), v);
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see
	 * org.sat4j.minisat.core.DataStructureFactory#createUnregisteredClause(
	 * org.sat4j.specs.VecInt)
	 */
	public Constr createUnregisteredClause(IVecInt literals) {
		return new CBClause(literals, getVocabulary());
	}

	@Override
	protected ILits createLits() {
		return new Lits();
	}

}
